I’ve checked on this option. it seems to be specific in modifying the incoming CID name/number (ANI) or the outbound caller ID of the extension.
What we were hoping to show on the phone is the DNIS for the incoming call, so we can see what DID the customer dialed into.
or you can test this, too:
if it’s really only 3 DIDs then you can use the CID Modifiers manually as well.
The CID Modifiers is just right for you.
For DID1, DID2 and DID3 you just set the CID Modifier and then on Inbound Routes as wanted.